1. Er is een boekwinkel die "Raven Books" heet, in Hadley. There is a bookshop called "Raven Books" in Hadley. Correct. However, I'd say "In Hadley is een boekwinkel die 'Raven Books' heet". 2. Er zijn twee boekwinkels die "Raven Books" heten, in Hadley. There are two bookshops called "Raven Books" in Hadley. Correct. But I would say "Er zijn twee boekwinkels in Hadley die 'Raven Books' heten." 3. Is er een boekwinkel die "Raven Books" heet, in Hadley? Is there a bookshop called "Raven Books" in Hadley? The sentence is correct, except for the comma. Commas are usually placed when there is a noticable pause when speaking the sentence. When saying this, you would not have a pause between 'heet' and 'in'. It's not a real mistake, but it would sound a bit weird when there would be a pause there. 4. Zijn er twee boekwinkels die "Raven Books" heten, in Hadley? Are there two bookshops called "Raven Books" in Hadley? Same story: the comma. Except for that, it's correct. 5. Er is geen boekwinkel die "Raven Books" heet, in Hadley. There isn't a bookshop called "Raven Books" in Hadley. It's correct, except for the comma again.

6. Er zijn niet twee boekwinkels die "Raven Books" heten, in Hadley. There aren't two bookshops called "Raven Books" in Hadley. It's correct without the comma. But I think most people would say: "Er zijn geen boekwinkels die 'Raven Books' heten in Hadley". 7. Is er geen boekwinkel die "Raven Books" heet, in Hadley? Isn't there a bookshop called "Raven Books" in Hadley? No comma here eighter. It's correct without it. 8. Zijn er niet twee boekwinkels die "Raven Books" heten, in Hadley? Aren't there two bookshops called "Raven Books" in Hadley? Without the comma it'd be correct. --- Comma's are only used when: * There is a hearable pause when speaking the sentence; * During an enumeration; * When you say more then one adjective (Oma heeft een mooie, oude, eiken linnenkast); * Before and after you give a detail you don't really have to give. (Like: vanavond ga ik, nadat ik de hond heb uitgelaten, televisie kijken). I hope this will help you! :) Thomas I used more than 2000 characters so I had to post it in 2 parts...